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A Systematic Study on Potentials of PV Tracking Modes
A. Hoffmann, H. Frindt, M. Spinnler, J. Wolf, T. Sattelmayer, T. Hartkopf
Tracking, Energy Performance, Modelling / Modeling
PV Systems
Subtopic: Grid-connected Applications
Event: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain
Session: 5BV.2.5
3378 - 3383
ISBN: 3-936338-24-8
Paper DOI: 10.4229/23rdEUPVSEC2008-5BV.2.5
0,00 EUR
Document(s): paper


In Europe, photovoltaic installations tracking towards the sun (PV-trackers) have become very popular during the last years, mainly in large ground mounted PV installations. However, predicting energy yield of tracked systems is highly inaccurate and, comparing with fixed plants, an extensive discussion on energy gains is put up. High uncertainty is mainly due to difficulties in a systematic approach on comparative measurements and simulations. Furthermore, simulated values generally show a smaller gain than values communicated by a variety of manufacturers. In the present paper, a systematic theoretical approach to this problem will be presented. A discussion of computational uncertainties will help to ensure accuracy of the applied models. Evaluation of potentials for different tracking modes, optimal module tilt angles and tracking time steps will be performed. An assessment of secondary effects like partial load behavior of module/inverter combination will conclude the study.